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Finding the Fourth Proportional to 139,664.67, 192,708.05 and 91,337.43

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Solution

The fourth proportional to 139,664.67, 192,708.05 and 91,337.43 is: 126,026.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,664.67 : 192,708.05 = 91,337.43 : x
  2. Step 2: Convert to fraction form
    139,664.67/192,708.05 = 91,337.43/x
  3. Step 3: Cross multiply
    139,664.67x = 192,708.05 × 91,337.43
  4. Step 4: Simplify right side
    139,664.67x = 17,601,458,293.28
  5. Step 5: Solve for x
    x = 17,601,458,293.28/139,664.67
  6. Step 6: Final answer
    x = 126,026.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.